Patents Assigned to T-WELL AS
  • Patent number: 11319775
    Abstract: A downhole tubular sleeve valve includes a rotary coaxial valve sleeve with a plurality of circumferentially spaced sleeve flow paths extending through the valve sleeve. The valve sleeve is located inside a housing. A plurality of circumferentially spaced outer bores extend through the housing and can be aligned with the plurality of sleeve flow paths. A protruding ring surround each of the circumferentially spaced outer bores inside the housing and form a protruding sealing surface conforming to a ported surface in the sleeve. A chamber exposed to the pressure outside the valve is formed between the housing and the sleeve, whereby a piston formed by the sleeve is exposed to the pressure outside the valve. A tension element biases a sealing surface on the sleeve towards each of the protruding ring surfaces.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: May 3, 2022
    Assignee: T-WELL AS
    Inventor: Kenneth Fuglestad